• Linus Torvalds's avatar
    Merge branch 'x86-apic-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip · c5f12fdb
    Linus Torvalds authored
    Pull x86 apic updates from Thomas Gleixner:
     - Cleanup the apic IPI implementation by removing duplicated code and
       consolidating the functions into the APIC core.
     - Implement a safe variant of the IPI broadcast mode. Contrary to
       earlier attempts this uses the core tracking of which CPUs have been
       brought online at least once so that a broadcast does not end up in
       some dead end in BIOS/SMM code when the CPU is still waiting for
       init. Once all CPUs have been brought up once, IPI broadcasting is
       enabled. Before that regular one by one IPIs are issued.
     - Drop the paravirt CR8 related functions as they have no user anymore
     - Initialize the APIC TPR to block interrupt 16-31 as they are reserved
       for CPU exceptions and should never be raised by any well behaving
     - Emit a warning when vector space exhaustion breaks the admin set
       affinity of an interrupt.
     - Make sure to use the NMI fallback when shutdown via reboot vector IPI
       fails. The original code had conditions which prevent the code path
       to be reached.
     - Annotate various APIC config variables as RO after init.
    [ The ipi broadcase change came in earlier through the cpu hotplug
      branch, but I left the explanation in the commit message since it was
      shared between the two different branches    - Linus ]
    * 'x86-apic-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (28 commits)
      x86/apic/vector: Warn when vector space exhaustion breaks affinity
      x86/apic: Annotate global config variables as "read-only after init"
      x86/apic/x2apic: Implement IPI shorthands support
      x86/apic/flat64: Remove the IPI shorthand decision logic
      x86/apic: Share common IPI helpers
      x86/apic: Remove the shorthand decision logic
      x86/smp: Enhance native_send_call_func_ipi()
      x86/smp: Move smp_function_call implementations into IPI code
      x86/apic: Provide and use helper for send_IPI_allbutself()
      x86/apic: Add static key to Control IPI shorthands
      x86/apic: Move no_ipi_broadcast() out of 32bit
      x86/apic: Add NMI_VECTOR wait to IPI shorthand
      x86/apic: Remove dest argument from __default_send_IPI_shortcut()
      x86/hotplug: Silence APIC and NMI when CPU is dead
      x86/cpu: Move arch_smt_update() to a neutral place
      x86/apic/uv: Make x2apic_extra_bits static
      x86/apic: Consolidate the apic local headers
      x86/apic: Move apic_flat_64 header into apic directory
      x86/apic: Move ipi header into apic directory
      x86/apic: Cleanup the include maze